Improvement in millstone-bushes and bearings



'stone of a grindingmill,`

aient @biblica ANDREWORTLI'R 0F EAST VINCENT, rnuusrmraum.` o

\ Letters Patent -l\lo.\108,0`4l5, dated October 4,1870.

" IMPRovEMENfr iN MILLsToNE-BUSHESAND BEARINGS.

The `Schedule refen'qdto in theseLetters Patent and makingpart of the same l, AnD-REW'ORTLIP, of East'v` Vincent, county of Chester, State of Pennsylvania, have invented an Improvement in Mil-lstonef'Bushes and Bearings, of which the following` isa spe'cicaton.

v Natura and Object of "the I nceittfioa.-

l My'invention consists, mainly, of a yoke or crosspiece attached to and rendered adjustable upon the trame` or beams which support thev lower stationary the said yoke having attached to it the wedge-shaped followers or -bearings (or wedges for workingup `the bearings) of the upright shaft or spindle which supports the upper revolving'stone,

an` accurate adjustment-of thesaid bearings or followers being Amuch more readily accomplishedby means of the yokethan when they are adjustedseparately, as, usual.` V

My invention also consists in certain improvements, fully described hereafter, in the bearings orfollower's, and in the bushing of the lower* stone for the -reception of the same. f

'Description of the Acconwam'ng Drawing. Figure -1 is asectionalview of the lower sta-.

tionary stone of a grinding-mill with my improve# ments; l

Fignre2, an invertedplan view ol' the same; Figures 3 and4, plan `and perspective views of `the-"central vport-ion of the stone, with 4its bushing;

and y Figure5, a perspective view of part of the upright shaft or lspindle, with my improved hearings or followers and wedges.' l p l v yf General"Dcscrton,

A represents thelower stationary stoneof ajgrinding-mill #B B,`two beams, secured to suitable frame-work, and arranged to support the stone; and t 0 O, cross-pieces, secured tothe said beams, and provided `with .threaded rods or bolts, :Dv D, which supporta yoke,F, the latter being retained between, and rendered vertically adjustable upon, the

saidrods by means ot' nuts, a anda,.on each of the' lttll.' l v `Inrtlie center ofthe` stone A is the usual cast-iron p bushing, H, for-the reception of the bearings or followers l of thelupright shaft or spindle J Awhich supports the upper revolving "stone, the latter not being shown in thedrawinghA There are, inl the present iustance,vthree of the bearings or follower-s1,` this number beingquit'e snlli- `cient `to maintain the'shaft` in. its proper position,

and being more readily adjusted simultaneously than four rany greater number wouldbe.

The said bearings are adapted to recesses x of the bush H, as shown in fig. 4, and each of 'them has, at

its upper end, lianges, b l), which rest upon guides or ledges, c c, of the bush. This enables the bearings to be moved inward or outward, toward or from the shaft,

and, at the same time, prevents them Yfrom falling, ori

from being drawn downward out of theirproper positions.

For the purpose of forcing the bearings upto the shaft, 1 employ wedges, K, which are fitted behind each of the"bearings I, the latter heilig slightly iu- .,clined, as shown'.

Each wedge K has secured to its lower end a rod, K', which .passes through an opening in -the yoke F, the said rods being threaded, and-'provided with nuts, t i', both above and below the yoke, so that they may be properly adjusted in such a manner as to set thebeari'ngs np equally to the shaft, and thus bring the'latter to a proper central and vertical position when the several parts are rst put together'. t

The main object of my invention is to enable the t bearings` after having been thus .accurately adjusted in the lirst place, to be set u p, as the several parts wear away, simultaneously and quickly, and yet with thefgreatest accuracy, for the slightestdeviation of theshaft from the perpendicularwill cause a corresponding deviationot the upper stone, and a consequent imperfect operation of themill.`

The yoke F, to which all the wedges for'acting upon the, bearings are connected, enables the adjnst- Y .mentto lbeefleetcd in a proper accurate manner, all that is necessarybein'g to lower the yoke by a manipulation of the nuts` a and a', in order to depress the wedges, and force the bearings toward the shaft, or to raise theV ,yoke by a contrary adjustment of the nuts, when it becomes necessary to ease the said bearings, owing to the-heating, &c., of the .l

shaft.

In some cases, the wedges K, operated by the yoke, asabove described, might 4be used directly as bearings or followers, without the intervention of the pieces I; but (I prefer-to use the latter, `as they insure a bearing upon the shaft at the most advantageous point, while the wedges, if used alone, would have to be moved either upward or downward upon the shaft, in Vorder to 'tighten them against the same.

. Claims. 1. 'rue combination, with the spindle J, Qf a minjstone bush, H, secured in the lower stone, a se- .ries of wedges or tapering blocks, tted to the bush and to the spindle, andan adjustable yoke, F, connected to the said wedges or bearings, so asto operate all the same simultaneously, substantially as set In testimony whereof I have signed my name to fort-h. this specioation in the presence of two subscribing 2. The combination of the said wedges vor blocks, witnesses. the adjust-able yoke F, and rods K', connected to the ANDREW ORTLIP. blocks and to theyoke, so as to he adjustable on the lutter, as set forth. Witnesses:

3. The combination of the adjustable yokeF, rods WM. A. STEEL,

D D, and cross-piece 0,215 desorbed. HARRY SMUJH. 

